posted August 21, 2018 03:56 PM
i have a 16mm sound film that has a unilateral variable area optical sound recording, Its a single sided wavy line and not a double sided is it a uncommon optical recording ? the film is Damsel in Distress with Fred Astaire, has any one else got a copy, if so has it got the same sound recording
From: San Francisco, CA
Registered: Jun 2003
posted August 21, 2018 07:58 PM
This unilateral variable area sound track you describe is an original RCA Photophone recording from the early 1930's. By 1934 the RCA Victor 'High Fidelity' System used a single bilateral variable area record. Variable density soundtracks are Movietone, Western Electric, Powers Cinephone and British Acoustic Film. The newer and more common dual bilateral variable area tracks are Westrex. There were other systems that used variable area and/or variable density records as well, but those mentioned above are the most common. I hope this information is helpful.